阅读说明：本技术 全生物降解pe材料及其制备方法，及应用 (Full-biodegradable PE material, preparation method and application thereof ) 是由 王时民 何春燕 于 2019-09-17 设计创作，主要内容包括：本申请提供一种全生物降解PE材料及其制备方法,及应用,其中,全生物降解PE材料,以重量份计,制备原料包括PE 70～92份、生物降解剂0.5～10份、有机树脂1～5份和助剂2～15份,生物降解剂包括生物膨胀剂、谷氨酸组合物和生物酶,生物膨胀剂、谷氨酸组合物和生物酶的重量比为0.01～5:0.1～10:1,谷氨酸组合物包含谷氨酸、戊二酸和聚乳酸,助剂至少包括开口剂、爽滑剂和抗静电剂。在PE的基础上添加载体树脂有利于各个组份的均匀混合,可加快全生物降解PE材料的生物降解；加入助剂(开口剂、爽滑剂和抗静电剂)有利于弥补因聚乙烯为全碳链结构而在应用上存在的不足,如产生静电及薄膜粘结。全生物降解PE材料为全生物降解,降解速度快,降解效率高,为全碳链的聚乙烯材料提供了一种新型的降解方式。(The application provides a full-biodegradable PE material, a preparation method and an application thereof, wherein the full-biodegradable PE material comprises, by weight, 70-92 parts of PE, 0.5-10 parts of a biodegradation agent, 1-5 parts of organic resin and 2-15 parts of an auxiliary agent, the biodegradation agent comprises a biological expansion agent, a glutamic acid composition and a biological enzyme, the weight ratio of the biological expansion agent to the glutamic acid composition to the biological enzyme is 0.01-5: 0.1-10: 1, the glutamic acid composition comprises glutamic acid, glutaric acid and polylactic acid, and the auxiliary agent at least comprises an opening agent, a slipping agent and an antistatic agent. The carrier resin is added on the basis of PE, so that the components are uniformly mixed, and the biodegradation of the fully biodegradable PE material can be accelerated; the addition of the auxiliary agents (opening agents, slipping agents and antistatic agents) is beneficial to making up the defects of application, such as static generation and film adhesion, caused by the fact that polyethylene has a full carbon chain structure. The fully biodegradable PE material is fully biodegradable, has high degradation speed and high degradation efficiency, and provides a novel degradation mode for the polyethylene material with a full carbon chain.)

1. The full-biodegradable PE material is characterized by comprising the following raw materials in parts by weight: 70-92 parts of PE, 0.5-10 parts of a biodegradation agent, 1-5 parts of organic resin and 2-15 parts of an auxiliary agent, wherein the biodegradation agent comprises a biological swelling agent, a glutamic acid composition and a biological enzyme, the weight ratio of the biological swelling agent to the glutamic acid composition to the biological enzyme is 0.01-5: 0.1-10: 1, the glutamic acid composition comprises glutamic acid, glutaric acid and polylactic acid, and the auxiliary agent at least comprises an opening agent, a slipping agent and an antistatic agent.

2. The fully biodegradable PE material according to claim 1, wherein the bio-enzyme is at least one of an oxidoreductase, a transferase, a hydrolase, a lyase and a ligase.

3. The fully biodegradable PE material according to claim 1, characterized in that the organic resin is a phenolic resin.

4. The fully biodegradable PE material according to claim 1, wherein the opening agent is at least one of talc, diatomaceous earth and silica.

5. The fully biodegradable PE material of claim 1, wherein the slip agent is at least one of stearamide, oleamide, and erucamide.

6. The fully biodegradable PE material according to claim 1, wherein the antistatic agent is at least one of ethoxylated fatty amine, dodecyl dimethyl betaine, alkyl ether phosphate and alkyl hydroxyethyl nitrate.

7. The fully biodegradable PE material according to claim 1, wherein the auxiliary agent further comprises a filler.

8. The fully biodegradable PE material according to claim 7, wherein the filler is calcium carbonate and toner.

9. The method for preparing the fully biodegradable PE material according to any one of claims 1 to 8, wherein the PE, the biodegradable agent, the organic resin and the auxiliary agent are weighed according to the formula, mixed and banburying in an internal mixer, and extruded and granulated after banburying, wherein the biodegradable agent is added during the mixing and banburying process and at a temperature below 130 ℃.

10. Use of the fully biodegradable PE material according to any one of claims 1 to 8 or the fully biodegradable PE material according to claim 9 in a PE product.

Technical Field

The application belongs to the technical field of PE materials, and particularly relates to a full-biodegradable PE material, and a preparation method and application thereof.

Background

Polyethylene (PE) is one of three general plastics, and has the advantages of rich raw material resources, moderate price, stable and reliable production process, superior product comprehensive performance and increasingly expanded application range, and the yield of the PE accounts for 1/3-1/5 of the total world plastic yield and is the top of all plastic varieties. The polyethylene material has many excellent properties, is more and more widely applied, can be processed by methods such as blow molding, extrusion, injection molding and the like, and is widely applied to manufacturing films, hollow products, fibers, daily sundry products and the like. However, since the polyethylene material has a saturated nonpolar molecular structure, the molecular chain formed by covalent bonds of the polyethylene material cannot be ionized, and is difficult to transfer electrons. Once the electrons are lost due to friction and charged, the electrons are difficult to eliminate, and because the water content of the polyethylene material is extremely low, the generated charges can only be accumulated on the surface of the material and cannot escape in time, so that static charges are easily generated in the production and use processes, the application of the polyethylene material is greatly influenced and limited, and antistatic treatment is required. Meanwhile, when polyethylene is blown (extruded), the adhesion among films and the caking among granules are easy to occur, and as the opening agent and the slipping agent are added in the processing of a plurality of polyethylene films to increase the smoothness of the film surface, the adhesion of dust on the surface of a product is prevented, and a very smooth plastic product is produced.

In recent 50 years, plastic products represented by polyethylene are exponentially increased, the nondegradable property of the plastic products also causes serious environmental problems, and the polyethylene is of an all-carbon chain structure and is difficult to degrade, and the common chemical degradation method is difficult to work, so that the development of an efficient biodegradation method has important significance for sustainable development of the polyethylene material industry.

Content of application

The application aims to provide a full-biodegradable PE material, a preparation method and application thereof, which are in a full-biodegradation mode and have the advantages of high degradation speed and high degradation rate.

In order to achieve the above object, a first aspect of the present application provides a fully biodegradable PE material, which comprises the following raw materials in parts by weight: 70-92 parts of PE, 0.5-10 parts of a biodegradation agent, 1-5 parts of organic resin and 2-15 parts of an auxiliary agent, wherein the biodegradation agent comprises a biological swelling agent, a glutamic acid composition and a biological enzyme, the weight ratio of the biological swelling agent to the glutamic acid composition to the biological enzyme is 0.01-5: 0.1-10: 1, the glutamic acid composition comprises glutamic acid, glutaric acid and polylactic acid, and the auxiliary agent at least comprises an opening agent, a slipping agent and an antistatic agent.

Compared with the prior art, the carrier resin is added on the basis of the PE material in the fully biodegradable PE material, and is beneficial to uniformly mixing all components, so that the biodegradation of the fully biodegradable PE material can be accelerated; the addition of the auxiliary agents (opening agents, slipping agents and antistatic agents) is beneficial to making up the defects in application, such as static generation and film adhesion, caused by the fact that polyethylene has an all-carbon chain structure. According to the fully biodegradable PE material provided by the application, when the PE material is in an anaerobic condition or is buried, the glutamic acid composition and the biological enzyme contained in the PE material can attract microorganisms in soil to attach to the fully biodegradable PE material, and when the number of the microorganisms around the material reaches a certain number, the surrounding pH value can be influenced by the microorganisms, so that the surrounding oxygen is converted into carbon dioxide and water. Along with the rise of the temperature of the soil after the landfill, the biological expanding agent in the material is influenced by external conditions, so that molecules in the material become larger, the outer layer of the molecules becomes thinner and thinner, meanwhile, the glutamic acid composition and the biological enzyme in the material are taken by the microbial flora as nutrients, and the secreted enzyme or acidic substance gradually decomposes macromolecules into micromolecules until the degradation process is finished. The application provides a full biodegradable PE material, it is full biodegradable, and degradation speed is fast, and degradation efficiency is high, provides a novel mode for the degradation of the polyethylene material of full carbon chain, has important meaning to the sustainable development of polyethylene material trade.

Further, the total biodegradable PE material comprises, by weight, 70 parts of PE, 74 parts of PE, 78 parts of PE, 82 parts of PE, 85 parts of PE, 90 parts of PE and 92 parts of PE; the biological degradation agent is specifically but not limited to 0.5 part, 1 part, 3 parts, 5 parts, 7 parts, 9 parts and 10 parts; the organic resin is specifically but not limited to 1 part, 2 parts, 3 parts, 4 parts and 5 parts; the assistant is specifically but not limited to 2 parts, 5 parts, 8 parts, 10 parts, 12 parts, 13 parts and 15 parts. The sum of the weight of the opening agent, the slipping agent and the antistatic agent is within 2-15 parts, and the content of each should not be 0, more specifically, the opening agent can be 0.5-2 parts, the slipping agent can be 1-5 parts, and the antistatic agent can be 0.5-2 parts. The weight ratio of the biological bulking agent, glutamic acid composition, and biological enzyme is specifically, but not limited to, 0.01:0.1:1, 0.01:1:1, 0.01:5:1, 0.01:10:1, 0.1:0.1:1, 0.1:1:1, 0.1:5:1, 0.1:10:1, 5:0.1:1, 5:1:1, 5:5:1, 2:2:1, 1:1: 2.

Further, the biological enzyme is at least one of oxidoreductase, transferase, hydrolase, lyase, and ligase. The glutamic acid composition comprises glutamic acid, glutaric acid and polylactic acid, wherein the glutamic acid participates in a plurality of reactions in microorganisms, is an important nutrient substance for microbial metabolism and can attract microbial aggregation in soil; the biological complex enzyme comprises one or more of oxidoreductase, transferase, hydrolase, lyase and ligase. The biological compound enzyme promotes the catabolism of substances in nature, wherein, the redox enzyme catalyzes an oxidation reduction reaction, the transferase catalyzes a chemical functional group transfer, the hydrolase catalyzes a hydrolysis reaction, the lyase catalyzes and increases a double bond reaction, the isomerase catalyzes an isomerization reaction, and the ligase catalyzes ATP to form a new construction. Biocomplexes are proteins, in some cases hydrolysable to amino acids, which are absorbed and utilized as nutrients. The biological expanding agent is a mixture of polyurethane and vegetable protein, and the weight ratio of the polyurethane to the vegetable protein is 1: 1.

Furthermore, the organic resin is phenolic resin, and the phenolic resin has better alkali resistance, wear resistance, oil resistance and corrosion resistance, so that the performance of the PE material is better.

Further, the opening agent is at least one of talcum powder, diatomite and silicon dioxide. The polyethylene-modified polyurethane composite material has good compatibility with PE, is stable to heat, oxygen and ultraviolet rays, has a typical polar and nonpolar molecular structure, can form a monomolecular film on a material interface, and has the effects of adhesion resistance, smoothness, slip increasing, leveling, water resistance, moisture resistance, precipitation resistance, pollution resistance, static resistance, dispersion and the like.

Further, the slip agent is at least one of stearamide, oleamide and erucamide, and changes the sliding property and the blocking resistance of the film by remarkably reducing the friction coefficient of the film. The slipping agent and the opening agent are mixed for use, a synergistic effect can be generated, and the friction coefficient of the PE film can be better reduced due to the existence of the opening agent under the condition that the slipping agent exists; in the case of the opening agent, the PE film can be prevented from blocking even better by the presence of the slipping agent, and the opening agent is preferably amorphous silica, and the slipping agent is preferably oleamide.

Further, the antistatic agent is at least one of ethoxylated fatty amine, dodecyl dimethyl betaine, alkyl ether phosphate and alkyl hydroxyethyl nitrate. Preferably, the ethoxylation aliphatic amine has better compatibility with PE and good antistatic performance.

Furthermore, the auxiliary agent also comprises a filler, and the filler is calcium carbonate and toner. Calcium carbonate can increase the mechanical strength of the PE material, and toner can make the PE material show different colors.

the second aspect of the application provides a preparation method of a full-biodegradable PE material, weighing the PE, the biodegradable agent, the organic resin and the auxiliary agent in formula amounts, mixing and banburying in an internal mixer, and extruding and granulating after the banburying is finished, wherein the biodegradable agent is added in the mixing and banburying process at a temperature below 130 ℃. The biodegradable agent is added below 130 ℃ to avoid the influence of high temperature on the performance of the biodegradable agent.

In a third aspect, the present application provides a use of the above degradable PE material in a PE article.

Detailed Description

The fully biodegradable PE material of the present application will be further described in detail with reference to the following specific examples, which should not be construed as limiting the scope of the present application.

The fully biodegradable PE material of the present application will be further described in detail with reference to the following specific examples, which should not be construed as limiting the scope of the present application.